Carteirinha is a diminutive of carteira (wallet or ID card). It specifically refers to a small identification card, often a membership card or a student ID.
In the context of "Metrópole," the word highlights the bureaucratic and impersonal nature of urban life, where access to services like medical attention is denied without the proper carteirinha. It's a poignant detail that underscores the song's critique of societal indifference and the dehumanizing aspects of modern city living.
Legiao Urbana built "Metropole" as two scenes stitched together with no transition. It opens on a TV crew turning a street accident into entertainment: "E sangue mesmo nao e Merthiolate" ["It's real blood, it's not Merthiolate"], "Vai passar na televisao!" ["It's going to be on television!"]. Then, with no warning, the song drops into a bureaucratic waiting room of clipped orders and paperwork demands: "Por gentileza aguarde um momento" ["Please wait a moment"], "Sem carteirinha, nao tem atendimento" ["No service without a card"], "Ordens sao ordens" ["Orders are orders"], repeated six times like a recording stuck on loop.
Renato Russo wrote it for Legiao Urbana's 1986 album "Dois," and the two scenes are really one complaint: a system that processes people as spectacle or paperwork, never as anyone in particular. It ends with the narrator just wanting to get home before the soap opera starts: "E eu nao quero ficar na mao" ["And I don't want to be left in the lurch"].